diff --git a/src/device_manager/config/config.js b/src/device_manager/config/config.js
deleted file mode 100644
index bdf2e36e6..000000000
--- a/src/device_manager/config/config.js
+++ /dev/null
@@ -1,31 +0,0 @@
-export default {
-  // The device `id` to select on start, if not indicated, the first available from `devices` will be used.
-  default: null,
-
-  // Default devices
-  devices: [
-    {
-      id: 'desktop',
-      name: 'Desktop',
-      width: '',
-    },
-    {
-      id: 'tablet',
-      name: 'Tablet',
-      width: '770px',
-      widthMedia: '992px',
-    },
-    {
-      id: 'mobileLandscape',
-      name: 'Mobile landscape',
-      width: '568px',
-      widthMedia: '768px',
-    },
-    {
-      id: 'mobilePortrait',
-      name: 'Mobile portrait',
-      width: '320px',
-      widthMedia: '480px',
-    },
-  ],
-};
diff --git a/src/device_manager/config/config.ts b/src/device_manager/config/config.ts
new file mode 100644
index 000000000..891d321fe
--- /dev/null
+++ b/src/device_manager/config/config.ts
@@ -0,0 +1,55 @@
+export interface DeviceManagerConfig {
+  /**
+   * The device `id` to select on start, if not indicated, the first available from `devices` will be used.
+   * @default ''
+   */
+  default?: string;
+  /**
+   * Default devices.
+   * @example
+   * devices: [{
+   *  id: 'desktop',
+   *  name: 'Desktop',
+   *  width: '',
+   * }, {
+   *  id: 'tablet',
+   *  name: 'Tablet',
+   *  width: '770px',
+   *  widthMedia: '992px',
+   * },
+   * ...
+   * ]
+   */
+  devices?: Array<object>; // TODO
+}
+
+const config: DeviceManagerConfig = {
+  default: '',
+  devices: [
+    {
+      id: 'desktop',
+      name: 'Desktop',
+      width: '',
+    },
+    {
+      id: 'tablet',
+      name: 'Tablet',
+      width: '770px',
+      widthMedia: '992px',
+    },
+    {
+      id: 'mobileLandscape',
+      name: 'Mobile landscape',
+      width: '568px',
+      widthMedia: '768px',
+    },
+    {
+      id: 'mobilePortrait',
+      name: 'Mobile portrait',
+      width: '320px',
+      widthMedia: '480px',
+    },
+  ],
+};
+
+export default config;